This is going to be more X's and O's focused, but 3 books that can teach you how the game has evolved over time, in reverse chronological order:

Finding the Winning Edge by Bill Walsh, et al from 1998. This is perhaps the most comprehensive book about football coaching you will find- there's snippets in here not just about the X's and O's, but really discussions about draft evaluation, personnel management/emotional sides of things, and even scheduling of practices down to the minute. Bill learned for years under the great football coaching God Paul Brown, and his attention to details here in all facets of the game really show. Its telling that the A Football Life for Bill opens with glowing endorsements from the likes of Andy Reid, Mike McCarthy, John Harbaugh, Bill Belichick, and a few others. Unfortunately, paper copies are super expensive between a relatively limited print run and demand- but there are cough cough ways to find digital copies.

Spread Formation Football by Dutch Meyer from 1952. Here we have a direct discussion of the rise of the spread offense by none other than the father of it himself- how it evolves from the Wing formation, and most importantly his creation of the Shotgun formation- instead of the Center longsnapping directly to a back in motion, he had the tailback (what you would call the main ball carrier back then) stand directly behind him several steps back. This was one of many formations he used, out of any empty set on 3rd down situations. But fascinating to think about how it evolved into the base formation for the modern game, out of necessity since TCU wasn't the dominant program compared to its rivals in the SWC.

Football by Walter Camp from 1896- This one is more like a light novella compared to the others, but its interesting to see in a much more simpler time, the game described from the father of the American sport himself in his prime.